Valve mechanism.



E. I. THURBER & I. W. RACKLYEFT.

vALvE MEcHANlsM'. APPLICATION FILED DEC. I1. 19.14.

1 ,27 1 ,805; Patented July 9, 1918.

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EDWARD Jr THURBER, 0F NEW ORLEANS, LOUISIANA, AND JOHN W. RACKLYIEIFT,v 0F

DETROIT, MICHIGAN, ASSIGNORS, BY MESNE ASSIGNMENTS, TO NORTHERN ENGI- NEERING- WORKS, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

VALVE MEcHANIsivi.

Specification of Letters Patent.

Patented July 9, 1918.

Application filed December 17, 1914:. Serial No. 877,831.

Y To all whom t may concern.'

Be it known that we, EDWARD J. THURBER,

siding in New Orleans, parish of Orleans, State of Louisiana, and JOHN W.' RACK- LYEFT, a citizen kof the United States of America, residing at Detroit, Wayne county, and State of Michigan, have invented certain new and useful Improvements in Valve Mechanism, of which the following is a speciiication, reference being had therein to the accompanying drawings.

` The invention relates to valve mechanisms and resides in the novel construction, arrangement and combination of parts as will more fully hereinafter appear. i

The improved' valve is adapted for various uses, but as it is peculiarly useful in connection with an enginestarting system employing a compressed fluid, it will be illustrated and described in connection with such a starter system, though it is not desired to limit the protection to this particular use.

In the drawings,-

Figure 1 is a diagrammatic illustration showing a starting system having the improvement applied thereto;

Fig. 2 is an enlarged vertical central section'through the valve mechanism;

Fig. 3 is a section on the line 3-3 of Fg- 2;

Fig. 4 is a section on a line corresponding to 4 4 of Fig. 2 of a modied form;

Figs. 5 and 6 illustrate the valve parts in diiierent positions of adjustments; and

Fig. 7 is a side elevation partly in section, showing a slightly modified construction.

Referring to the structure illustrated in the drawings, A designates a starter of the compressed air type, A. the crank shaft of the engine to which the starter is connected, B'the tank for compressed air and C a valve mechanism embodying the invention. D is a conduit leading from the tank B and connected by means of the valve mechanism C with a conduit E that leads to the rotor chamber F of the starter A. G is a conduit leading from the pump H of the starter to the valve mechanism C.

The casing I of the valve mechanism is provided with chambers J and K adapted to communicate by means of a port L that is controlled byV a valve M. The latter is arranged within the chamber J and is adapted to engage a seat N formed on the inner face of the ported web O that separates the chambers J and K. P and Q are threaded nipples cast integral with the casing I and leading from the chambers J and K respectively. The nipple P is attached by a coupling S to the conduit D and the nipple Q is similarly connected to the conduit E. The portion oi' the chamber forming the casing J is open at the bottom, and arranged within the open end of the casing and having a threaded engagement therewith is a iitting R. This fitting is provided with a chamber T communicating with the chamber J and in reality forming a continuation thereof. The

base of the chamber T has an apertured 1 valve seat U that establishes communication between the chamber T and a nipple V which is connected to the conduit Gr, the latter as before stated, leading from the pump. W is afvalve adapted to engage the seat U, the valve having a sliding movementwith the lower portion of the chamber T, which as will be readily seen upon reference to Fig. Y

2,` is of slightly less cross-section than the upper portion of this chamber. The lower portion of the chamber T-as shown in Fig. B-has the inner wall X circular, while the sides Y of the valve W are polygonal, forming spaces Z to permit the compressed iuid to pass between the walls Y and X.

B is a valve rod Xedly connected to, or cast integral with the valve M, and C is an extension of the stem B that projects below the member M. D is a stem upon the valve W and E is a coil spring sleeved upon the portions C and D and having the opposite ends abutting against the lower face of the valve M and the upper face of the valve W respectively. This spring normally shown, lthe portion F is externally threaded,

and yupon 4this threaded rportion 4iis arranged an apertured'arm-I of a bracket Je. K is a nut for clamping the arm I in place, and L is an upwardly extending arm 'of the bracket J to Which the lever G is pivoted atMl. vl"Ehe upper endof theleveris pivotally connected at ,N to xa rod Aor :other connection O that is'attached to`an oprat ing lever betten P.- When the parts ofthevalve mechanism are normal, the valves"M and Ware ein the "position shown v2, and-in xthis'position' the chamber .I is ill .free communCation 'with the tank-land compressed air 'the spring E" in holding the valves to @their seatsf Vhe'n itis desiredlto start the ,engine the operator depressies'the` pedal llnitton P, 'Whiehftl1rough'-the medium of the connection O aetuates ,the lever G" cause .the

valve M'to open. Upon lthe opening of the valve M compressed dr'othertluid under compression in lthev tank B pas'fses'ffroin'the 'tankiBby 'means of the conduits Band-E and the valve :ceasing ,to the rotor F setting the latter operation. v'Ylhen'-theengilfie' yis started',thei operator releases the pedal P 'andthe valve M is closed'by the Ispring E.' vIt is desirable toha've some'in'eans' of ascertainingthe' pressure in the 'tanks' B and vve'therefore provide the system With a gage Q that Ais" connected to thec'hamber Jby meansrof a conduit R that yis attached to a nppleS ,that is ifi eren' cmmu'nietsh with the chamber J. i

When the pressure in the tank falls the pump isset in operation. Preferably the pump,v is manually:controlled` as by provid- V in'g "a suitable j 'clutch T"mecha nisrn adapted `to beioperated a pedal'leverT and levers U, this elutch'mechanism connectingr the y pump'to tliefshaft A" asto be driven therefrom, as'vvill 'be readily understood. When the' pump is inoperation, as soony as the pressure inv the conduitG is sufficient to overcome 'the' 'tension of :the 'spring'E, compressed air enters" the Ycliai'nber `J` land flows through the conduit D tetheJ tankB. i Upon the'iopening ofthe' valveW th'e'spring E is compressed, as shown in fandthereforeactsto tightly press the valve M Pto its seat. 'Al-so' lthe "compressed l"airy from Ithe Chamber'rr lwin assise in holding uns valve lclosed lhen the `rcompressed:'airi'in "the tank B reaches predetermined pressure, las indicated 'bythe gage the operator disreadily apparent upon reference toFigs. 5

and -G-not only'normallyl holds 4the valves M and W to their seats, but upon the opening of either valve, adds Agreaterforce .t'o retain ,the yother valve in .engagement ,with the Seat. v

In order that compressed air in the tanky `Bfmay be utilized for filling tires, We provide the conduit R with a fitting V to :which '-is adapted to be attached aflexible conduit er ,the like, for filling the tires. The tire iinflating' operation may thereforeV be performed Without `a,ffecting xthe .pump lor ,the `starting mec ia'nism.A If ,desired vthe controlled nipple A2 vfor providingfanges'cape for'tlie compressed air in case ,theloperator fails 'to uncouple ,the pump kH from theshaft `heen x11eaqlljed.v

Inuse'it'has Vbeen found that Water yvvill condense in the pipe linesbetween the anfd ,the reservoir, andy also thatsome :oil collects therein. 'U on `rthe,operation `of ,the pump `this lOil Ian Water I`collects in the Nehamber'T,"lint' uponl-the opening ef the valve M thecompressed air"will' blow out all the'oil' Water that' has'collected in the chamber Tthreugh the JE into the` innig.' 7 ,there is ehem a VSlightly modi- 'ed construction inlwhichy the valve sli-des down 'and is governedby an extension llg'llpen the' Yah/ie l 2 teA retain tto its seat, ivhil'e'a separate coil 4spirixnrg; E3Y is empleyed Zfor holding the to its sefat.` The remaining parts of this structure are lthe same as described in connection ivith the arrangement yshown 'in Figs. l to- 6 inclusive.

If .desired e Safety valve e may be .emrloifed, "thS valve as i .Sheva in Fg- .4',10111- muniatmg" with the Chamber Jl Wbent'h'e PlGSLSIGH the tank B reaches a Predeterlleefroiht if the .Operator de'esetds- @Queeste the Pump, the" valve" ,a Will bant@- mati'cally epened againstv the tension ofthe springe andprevent an excess of pressure thetank B. The. Spring Z) is Aof course, of

.Such misin. that i@ will had fhevaive a to its ys'eat luntil a predetermined pressure hasbeen reached. The safety valve; may of course, be'onnttedfrom 'the system or ap- 'plied thereto as desired.

i Whatfive claim as r our invention is A valve mechanism comprising a casing 105 ,G2 of the .val-,ve M2. E? is "a Coil 'Spring acti having opposed ports, valves respectively In testimony whereof We affix our signa- 30 controlling said ports, a spring interposed tures in presence of witnesses.

between said valves tending to normally EDW. J. THURBER. maintain the same closed, another spring JOHN W. RACKLYEFT. abutting at one end against one of said Witnesses:

valves and abutting at its other end against SOLOMON WOLFF,

the casing, and means for manually control- MILDRED M. PENDERGAST,

ling the Valve against Which both springs ADELAIDE I. ADAMS,

abut. J. S. MURRAY.

Copies of this patent may be obtained for five cents each1 by addressing the Commissioner of Patents. Washington, D. 0. 

